./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:02:04,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:02:04,469 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:02:04,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:02:04,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:02:04,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:02:04,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:02:04,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:02:04,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:02:04,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:02:04,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:02:04,544 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:02:04,544 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:02:04,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:02:04,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:02:04,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:02:04,550 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:02:04,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:02:04,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:02:04,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:02:04,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:02:04,558 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:02:04,559 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:02:04,559 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:02:04,560 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:02:04,560 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:02:04,560 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:02:04,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:02:04,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:02:04,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:02:04,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:04,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:02:04,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:02:04,563 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:02:04,563 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:02:04,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:02:04,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:02:04,564 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:02:04,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:02:04,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:02:04,565 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:02:04,565 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2023-11-06 22:02:04,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:02:04,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:02:04,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:02:04,959 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:02:04,960 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:02:04,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2023-11-06 22:02:08,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:02:08,388 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:02:08,388 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2023-11-06 22:02:08,418 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/data/dc5bb1e49/8a80510c7d7c48faab5148e61f3e2dd7/FLAG62c8f9a0f [2023-11-06 22:02:08,434 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/data/dc5bb1e49/8a80510c7d7c48faab5148e61f3e2dd7 [2023-11-06 22:02:08,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:02:08,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:02:08,440 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:08,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:02:08,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:02:08,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:08" (1/1) ... [2023-11-06 22:02:08,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da27ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:08, skipping insertion in model container [2023-11-06 22:02:08,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:08" (1/1) ... [2023-11-06 22:02:08,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:08,822 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 22:02:09,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:09,243 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:02:09,265 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-06 22:02:09,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:09,426 WARN L672 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:02:09,434 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:02:09,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09 WrapperNode [2023-11-06 22:02:09,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:09,437 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:09,437 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:02:09,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:02:09,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,541 INFO L138 Inliner]: procedures = 310, calls = 77, calls flagged for inlining = 17, calls inlined = 12, statements flattened = 243 [2023-11-06 22:02:09,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:09,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:02:09,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:02:09,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:02:09,554 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,605 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:02:09,629 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:02:09,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:02:09,630 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:02:09,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (1/1) ... [2023-11-06 22:02:09,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:09,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:02:09,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fff9502-6b28-4498-bdf2-1529de1a7ba5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:02:09,717 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-11-06 22:02:09,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-11-06 22:02:09,717 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-11-06 22:02:09,718 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-11-06 22:02:09,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:02:09,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:02:09,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:02:09,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:02:09,720 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:02:09,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:02:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:02:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:02:09,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:02:09,725 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:02:09,928 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:02:09,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:02:10,331 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:02:10,345 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:02:10,346 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:02:10,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:10 BoogieIcfgContainer [2023-11-06 22:02:10,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:02:10,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:02:10,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:02:10,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:02:10,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:08" (1/3) ... [2023-11-06 22:02:10,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403dd080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:10, skipping insertion in model container [2023-11-06 22:02:10,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:09" (2/3) ... [2023-11-06 22:02:10,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403dd080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:10, skipping insertion in model container [2023-11-06 22:02:10,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:10" (3/3) ... [2023-11-06 22:02:10,375 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2023-11-06 22:02:10,384 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:02:10,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:02:10,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:02:10,396 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:02:10,538 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:02:10,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 286 places, 300 transitions, 614 flow [2023-11-06 22:02:10,837 INFO L124 PetriNetUnfolderBase]: 21/298 cut-off events. [2023-11-06 22:02:10,837 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:02:10,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 298 events. 21/298 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 733 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2023-11-06 22:02:10,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 300 transitions, 614 flow [2023-11-06 22:02:10,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 287 transitions, 583 flow [2023-11-06 22:02:10,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:10,904 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 287 transitions, 583 flow [2023-11-06 22:02:10,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 287 transitions, 583 flow [2023-11-06 22:02:10,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 287 transitions, 583 flow [2023-11-06 22:02:11,015 INFO L124 PetriNetUnfolderBase]: 21/287 cut-off events. [2023-11-06 22:02:11,016 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:02:11,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 287 events. 21/287 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 681 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2023-11-06 22:02:11,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 37480 [2023-11-06 22:02:20,065 INFO L134 LiptonReduction]: Checked pairs total: 55293 [2023-11-06 22:02:20,065 INFO L136 LiptonReduction]: Total number of compositions: 284 [2023-11-06 22:02:20,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:02:20,090 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4244dac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:02:20,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-11-06 22:02:20,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:02:20,098 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-06 22:02:20,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:02:20,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:20,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:02:20,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting writer_fnErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-11-06 22:02:20,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 608112641, now seen corresponding path program 1 times [2023-11-06 22:02:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:20,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587339789] [2023-11-06 22:02:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:20,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587339789] [2023-11-06 22:02:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587339789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:20,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:02:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409458244] [2023-11-06 22:02:20,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:20,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:20,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 584 [2023-11-06 22:02:20,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:20,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:20,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 584 [2023-11-06 22:02:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:25,151 INFO L124 PetriNetUnfolderBase]: 21484/31567 cut-off events. [2023-11-06 22:02:25,152 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-06 22:02:25,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62520 conditions, 31567 events. 21484/31567 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 207010 event pairs, 10375 based on Foata normal form. 830/18141 useless extension candidates. Maximal degree in co-relation 62257. Up to 18269 conditions per place. [2023-11-06 22:02:25,426 INFO L140 encePairwiseOnDemand]: 571/584 looper letters, 113 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-11-06 22:02:25,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 492 flow [2023-11-06 22:02:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:02:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 955 transitions. [2023-11-06 22:02:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5450913242009132 [2023-11-06 22:02:25,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 955 transitions. [2023-11-06 22:02:25,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 955 transitions. [2023-11-06 22:02:25,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:25,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 955 transitions. [2023-11-06 22:02:25,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.3333333333333) internal successors, (955), 3 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:25,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 584.0) internal successors, (2336), 4 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:25,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 584.0) internal successors, (2336), 4 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:25,488 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 167 flow. Second operand 3 states and 955 transitions. [2023-11-06 22:02:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 492 flow [2023-11-06 22:02:25,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 125 transitions, 485 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:02:25,502 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 166 flow [2023-11-06 22:02:25,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=584, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-11-06 22:02:25,508 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2023-11-06 22:02:25,509 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 166 flow [2023-11-06 22:02:25,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:25,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:25,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:02:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:02:25,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-11-06 22:02:25,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash 608114698, now seen corresponding path program 1 times [2023-11-06 22:02:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:25,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134792063] [2023-11-06 22:02:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:25,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134792063] [2023-11-06 22:02:25,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134792063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:02:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778275975] [2023-11-06 22:02:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:25,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:25,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 584 [2023-11-06 22:02:25,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:25,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 584 [2023-11-06 22:02:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:31,291 INFO L124 PetriNetUnfolderBase]: 36341/53259 cut-off events. [2023-11-06 22:02:31,292 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2023-11-06 22:02:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110226 conditions, 53259 events. 36341/53259 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 370457 event pairs, 17723 based on Foata normal form. 0/30767 useless extension candidates. Maximal degree in co-relation 95168. Up to 30877 conditions per place. [2023-11-06 22:02:31,918 INFO L140 encePairwiseOnDemand]: 578/584 looper letters, 113 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-11-06 22:02:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 516 flow [2023-11-06 22:02:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:02:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2023-11-06 22:02:31,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325342465753424 [2023-11-06 22:02:31,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2023-11-06 22:02:31,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2023-11-06 22:02:31,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:31,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2023-11-06 22:02:31,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:31,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 584.0) internal successors, (2336), 4 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:31,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 584.0) internal successors, (2336), 4 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:31,942 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 166 flow. Second operand 3 states and 933 transitions. [2023-11-06 22:02:31,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 516 flow [2023-11-06 22:02:31,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 125 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:02:31,959 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 182 flow [2023-11-06 22:02:31,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=584, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-11-06 22:02:31,962 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2023-11-06 22:02:31,962 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 182 flow [2023-11-06 22:02:31,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:31,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:31,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:31,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:02:31,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-11-06 22:02:31,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:31,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1671689966, now seen corresponding path program 1 times [2023-11-06 22:02:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:31,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122127803] [2023-11-06 22:02:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:31,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:32,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122127803] [2023-11-06 22:02:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122127803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:32,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:32,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:02:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029365014] [2023-11-06 22:02:32,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:02:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:02:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:02:32,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 584 [2023-11-06 22:02:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 263.1666666666667) internal successors, (1579), 6 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:32,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:32,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 584 [2023-11-06 22:02:32,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:38,811 INFO L124 PetriNetUnfolderBase]: 37351/54101 cut-off events. [2023-11-06 22:02:38,811 INFO L125 PetriNetUnfolderBase]: For 5133/5133 co-relation queries the response was YES. [2023-11-06 22:02:38,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116242 conditions, 54101 events. 37351/54101 cut-off events. For 5133/5133 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 369426 event pairs, 17383 based on Foata normal form. 77/32055 useless extension candidates. Maximal degree in co-relation 108164. Up to 51827 conditions per place. [2023-11-06 22:02:39,187 INFO L140 encePairwiseOnDemand]: 576/584 looper letters, 119 selfloop transitions, 10 changer transitions 0/139 dead transitions. [2023-11-06 22:02:39,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 581 flow [2023-11-06 22:02:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:02:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:02:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1439 transitions. [2023-11-06 22:02:39,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928082191780822 [2023-11-06 22:02:39,195 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1439 transitions. [2023-11-06 22:02:39,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1439 transitions. [2023-11-06 22:02:39,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:39,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1439 transitions. [2023-11-06 22:02:39,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 287.8) internal successors, (1439), 5 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:39,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 584.0) internal successors, (3504), 6 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:39,214 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 584.0) internal successors, (3504), 6 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:39,215 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 182 flow. Second operand 5 states and 1439 transitions. [2023-11-06 22:02:39,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 581 flow [2023-11-06 22:02:39,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 139 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:02:39,226 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 246 flow [2023-11-06 22:02:39,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=584, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2023-11-06 22:02:39,228 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2023-11-06 22:02:39,232 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 246 flow [2023-11-06 22:02:39,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 263.1666666666667) internal successors, (1579), 6 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:39,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:39,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:39,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:02:39,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting writer_fnErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-11-06 22:02:39,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1671624214, now seen corresponding path program 1 times [2023-11-06 22:02:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:39,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071544797] [2023-11-06 22:02:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:39,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071544797] [2023-11-06 22:02:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071544797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:39,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:39,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:02:39,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953140904] [2023-11-06 22:02:39,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:39,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:02:39,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:02:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:02:40,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 584 [2023-11-06 22:02:40,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:40,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:40,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 584 [2023-11-06 22:02:40,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:46,429 INFO L124 PetriNetUnfolderBase]: 37089/53791 cut-off events. [2023-11-06 22:02:46,430 INFO L125 PetriNetUnfolderBase]: For 9794/9794 co-relation queries the response was YES. [2023-11-06 22:02:46,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122585 conditions, 53791 events. 37089/53791 cut-off events. For 9794/9794 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 369779 event pairs, 17979 based on Foata normal form. 55/31857 useless extension candidates. Maximal degree in co-relation 112424. Up to 51795 conditions per place. [2023-11-06 22:02:46,756 INFO L140 encePairwiseOnDemand]: 575/584 looper letters, 122 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2023-11-06 22:02:46,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 152 transitions, 719 flow [2023-11-06 22:02:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:02:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:02:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1718 transitions. [2023-11-06 22:02:46,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490296803652968 [2023-11-06 22:02:46,765 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1718 transitions. [2023-11-06 22:02:46,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1718 transitions. [2023-11-06 22:02:46,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:46,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1718 transitions. [2023-11-06 22:02:46,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 286.3333333333333) internal successors, (1718), 6 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:46,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 584.0) internal successors, (4088), 7 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:46,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 584.0) internal successors, (4088), 7 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:46,789 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 246 flow. Second operand 6 states and 1718 transitions. [2023-11-06 22:02:46,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 152 transitions, 719 flow [2023-11-06 22:02:46,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 152 transitions, 719 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:02:46,808 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 374 flow [2023-11-06 22:02:46,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=584, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2023-11-06 22:02:46,809 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-11-06 22:02:46,810 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 374 flow [2023-11-06 22:02:46,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:46,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:46,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:46,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:02:46,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting writer_fnErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [reader_twoErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, reader_twoErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 43 more)] === [2023-11-06 22:02:46,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1198996353, now seen corresponding path program 1 times [2023-11-06 22:02:46,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051441128] [2023-11-06 22:02:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:47,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:47,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051441128] [2023-11-06 22:02:47,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051441128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:47,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:02:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966031336] [2023-11-06 22:02:47,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:02:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:02:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:02:47,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 584 [2023-11-06 22:02:47,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 374 flow. Second operand has 8 states, 8 states have (on average 253.375) internal successors, (2027), 8 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:47,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:47,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 584 [2023-11-06 22:02:47,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand